345242561 has 4 divisors (see below), whose sum is σ = 349612800. Its totient is φ = 340872324.

The previous prime is 345242539. The next prime is 345242563. The reversal of 345242561 is 165242543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 345242561 - 2¹⁰ = 345241537 is a prime.

It is a super-3 number, since 3×345242561³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345242563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2185001 + ... + 2185158.

It is an arithmetic number, because the mean of its divisors is an integer number (87403200).

Almost surely, 2^345242561 is an apocalyptic number.

It is an amenable number.

345242561 is a deficient number, since it is larger than the sum of its proper divisors (4370239).

345242561 is an equidigital number, since it uses as much as digits as its factorization.

345242561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370238.

The product of its digits is 28800, while the sum is 32.

The square root of 345242561 is about 18580.7039963506. The cubic root of 345242561 is about 701.5222389989.

The spelling of 345242561 in words is "three hundred forty-five million, two hundred forty-two thousand, five hundred sixty-one".